Final answer:
The subject is Physics and concerns the high school-level concept of calculating average speed by dividing distance traveled by elapsed time. The example shows how to compute average speed by using measures of distance and time for an athlete's running exercise.
Step-by-step explanation:
The subject in question pertains to the assessment of time required to cover a set distance or the distance covered in a set amount of time, which is typically covered in Physics. The calculation of average speed is an example of the application of physics concepts to understand motion. The average speed is calculated by dividing the total distance traveled by the elapsed time during the motion. In a high school physics classroom, this concept helps students understand the principles of kinematics, which is the description of motion without considering its causes.
Example
To illustrate, if a student measures that an athlete runs 2 kilometers in 30 minutes out and back, the average speed can be directly calculated. The total distance traveled would be 4 kilometers, considering the return trip. To find the average speed, one would divide the 4 kilometers by the total time, which is 1 hour (60 minutes), resulting in an average speed of 4 kilometers per hour.